JSON Schema to TypeScript / Zod

Overview

• Enter a JSON Schema and generate the corresponding TypeScript interface definition or Zod validation schema code.
• Supports the object, string, number, integer, boolean, array, and enum types, as well as the distinction between required and optional properties via `required`.
• Unlike the existing json-to-typescript tool (which infers types from a JSON value), this generates precise types/schemas from a JSON Schema definition that already carries type information.

Usage

1. Paste the JSON Schema into the input field.
2. Specify the target (TypeScript or Zod) and the type/variable name.
3. Click the "Convert" button to see the generated code.

Example

{"type":"object","properties":{"id":{"type":"string"}},"required":["id"]}

export interface Root {
  id: string;
}

Use Cases

• Generating TypeScript types for frontend use from a schema definition in API documentation (such as OpenAPI)
• Replacing JSON Schema-based validation with runtime validation using Zod
• Reviewing the structure represented by a JSON Schema in a more readable code form

FAQ

Notes

• The type/variable name must start with a letter or underscore and contain only letters, digits, or underscores.
• The conversion happens entirely in your browser.